WO2013094027A1

WO2013094027A1 - Vehicle seat

Info

Publication number: WO2013094027A1
Application number: PCT/JP2011/079550
Authority: WO
Inventors: 修深渡瀬; 綾山本
Original assignee: トヨタ自動車株式会社
Priority date: 2011-12-20
Filing date: 2011-12-20
Publication date: 2013-06-27
Also published as: JP5648754B2; EP2796315A4; US9376040B2; EP2796315B1; JPWO2013094027A1; CN103987573B; EP2796315A1; CN103987573A; US20140346819A1

Abstract

Obtained is a vehicle seat which enables the inflation and expansion of an inflation section to be completed in a short time. A vehicle seat (10) comprises: a seat cushion (14); a first inflation section (22R) which is provided within the seat cushion (14) so as to be positioned on one side thereof relative to the center of the seat cushion (14) in the seat width direction and which is inflated and expanded by gas supplied thereto; a second inflation section (22L) which is provided within the seat cushion (14) so as to be positioned on the other side thereof relative to the center of the seat cushion (14) in the seat width direction and which is inflated and expanded by gas supplied thereto, the inflation and expansion being performed so that the second inflation section (22L) faces the first inflation section (22R) in the seat width direction across a center space section (22C); and a gas supply means (20) which supplies gas to both the first inflation section (22R) and the second inflation section (22L) by being operated during a frontal collision of the vehicle.

Description

Vehicle seat

The present invention relates to a vehicle seat having an airbag in a seat cushion.

There is known a configuration in which a substantially rectangular airbag in which both rear corners are rounded in a plan view is provided in a seat cushion (see, for example, Japanese Patent Application Laid-Open No. 2010-95064).

By the way, in the case of a frontal collision, there is a request to stop the seated occupant from moving forward as soon as possible, and there is room for improvement in this point in the above technology.

It is an object of the present invention to obtain a vehicle seat that can complete the expansion and expansion of the expansion portion in a short time.

A vehicle seat according to a first aspect of the present invention includes a seat cushion, a first inflating portion that is provided on one side of the seat cushion with respect to the center in the seat width direction and is inflated and deployed by receiving gas supply; A second inflation provided on the other side of the seat cushion in the seat width direction and inflated and deployed so as to be opposed to the first inflatable portion in the seat width direction with a central space portion interposed between the first inflation portion and the gas supply. And a gas supply means for supplying gas to the first expansion section and the second expansion section by being actuated at the time of a frontal collision of the vehicle.

According to the above aspect, the gas supply means is activated when a frontal collision (unavoidable) of the vehicle is detected. Then, the first and second inflating parts are inflated and deployed by the gas supply from the gas supply means. Thereby, both thighs of the seated occupant are lifted, and the forward movement of the occupant is suppressed. Here, since the central space portion is formed between the first and second inflatable portions, the inflatable portion in this aspect is compared with a configuration having a rectangular or circular inflatable portion extending in the center in the sheet width direction. The total capacity of is small. For this reason, the expansion and expansion of the first and second expansion portions by the gas supply from the gas supply means is completed in a short time.

Thus, in the vehicle seat according to the above aspect, the expansion and expansion of the expansion portion can be completed in a short time.

In the above aspect, a third inflating portion that communicates the first inflating portion and the second inflating portion may be further provided.

According to said aspect, since the 1st, 2nd expansion part is connected via the 3rd expansion part, the air containing the 1st, 2nd expansion part which has a function which lifts both thighs of a seated passenger | crew The bag can be handled as an integral bag.

In the above aspect, the first to third inflating portions may constitute a U-shaped airbag that opens rearward in the seat front-rear direction in plan view and surrounds the central space portion.

According to the above aspect, since the airbag has a U-shape in plan view as a whole, it functions to lift both thighs of the seated occupant with a simple shape and a small-capacity U-shaped airbag. be able to.

In the above aspect, the first to third inflating portions may constitute a part of an annular airbag that forms an annular shape surrounding the central space portion in plan view.

According to the above aspect, since the airbag has an annular shape in plan view as a whole, the function of lifting both thighs of the seated occupant can be achieved with an annular airbag having a simple shape and a small capacity.

In the above aspect, the gas supply means may be disposed in the third inflating portion to fix the third inflating portion to the seat cushion.

According to the above aspect, since the gas supply means is arranged in the third expansion portion communicating with the first and second expansion portions, the gas supply means is shared by each expansion portion. Further, the displacement of the airbag relative to the seat cushion is regulated by the gas supply means.

In the above-described aspect, it may further include a bonding cloth provided in the seat cushion so as to cover the central space portion and bonded to each of the first to third inflating portions.

According to the above aspect, when the occupant is protected (restrained) against the front collision by each inflating portion, the inflating portions are prevented from being separated from each other by the bonding cloth (its tension). That is, each inflatable part is reinforced by the bonding cloth. In particular, each inflatable portion falls forward due to the inertia of the occupant, and an increase in the amount of forward movement of the occupant due to this is suppressed.

Said aspect WHEREIN: It arrange | positions facing the said center space part, comprises at least one part of a seat cooling means, It further has the duct which blows off air in the said seat cushion, and the said joining cloth has air permeability. It is good also as a structure.

According to the above aspect, the airbag can be provided while ensuring the reinforcing effect by the air blowing and the joining cloth from the seat cooling means to the seat cushion of the vehicle seat to which the seat cooling means is applied.

In the above aspect, it may further include a duct that is disposed facing the central space portion and constitutes at least a part of the seat cooling means, and blows air out of the seat cushion.

According to the above aspect, it is possible to provide the airbag while securing the air blowing from the seat cooling means to the seat cushion of the vehicle seat to which the seat cooling means is applied.

As described above, the vehicle seat according to the present invention has an excellent effect that the expansion and expansion of the expansion portion can be completed in a short time.

1 is a plan view showing a vehicle seat according to a first embodiment of the present invention with a part cut away. FIG. 3 is a perspective view showing the cushion airbag in a deployed state in the vehicle seat according to the first embodiment of the present invention with a part cut away. FIG. 3 is a partially cutaway side view showing a normal occupant seating state in the vehicle seat according to the first embodiment of the present invention. FIG. 3 is a side view showing a state in which the cushion airbag in the vehicle seat according to the first embodiment of the present invention is partially cut away. FIG. 4 is a partially cutaway front view showing a comparison of seating positions of a small occupant and a large occupant of the vehicle seat according to the first embodiment of the present invention. 1 is a plan view schematically showing a contact range between a cushion airbag and a small occupant constituting a vehicle seat according to a first embodiment of the present invention. 1 is a plan view schematically showing a contact range between a cushion airbag and a large occupant constituting a vehicle seat according to a first embodiment of the present invention. It is a top view which cuts and shows a vehicle seat which concerns on the 2nd Embodiment of this invention. It is a partially cutaway side view showing a vehicle seat according to a second embodiment of the present invention. It is a top view which cuts and shows the vehicle seat which concerns on the 3rd Embodiment of this invention. It is a top view which cuts and shows the vehicle seat which concerns on the 4th Embodiment of this invention. It is a perspective view which divides and shows the cushion airbag which comprises the vehicle seat which concerns on the 4th Embodiment of this invention.

The vehicle seat 10 according to the first embodiment of the present invention will be described with reference to FIGS. Note that an arrow FR appropriately shown in the figure indicates a forward direction in the vehicle longitudinal direction, an arrow UP indicates an upward direction in the vehicle vertical direction, and an arrow RH and an arrow LH indicate the right side (seat width) as viewed from the seated occupant P of the vehicle seat 10 One side of the direction) and the left side (the other side in the sheet width direction) are shown. In the following description, when using front and rear, up and down, and left and right directions unless otherwise specified, front and rear in the vehicle front and rear direction, up and down in the vehicle up and down direction, and left and right viewed from the seated occupant P are shown. The seat width direction and the vehicle width direction coincide with the left-right direction viewed from the seated occupant P.

FIG. 1 is a plan view showing the schematic overall configuration of the vehicle seat 10 with a part cut away. As shown in this figure, the vehicle seat 10 includes a seat cushion 14 on which an occupant is seated, and a seat back 16 having a lower end connected to the rear end side of the seat cushion and forming a backrest. A cushion airbag device 18 is disposed in the seat cushion 14. The cushion airbag device 18 includes an inflator 20 as a gas supply unit and a cushion airbag 22 as an airbag that inflates and deploys by receiving gas supply from the inflator 20 as main parts.

3, the cushion airbag device 18 has a mechanical component disposed between a seat pan 14 A and a cushion material 14 B constituting the seat cushion 14. As shown in FIG. 4, the cushion airbag 22 is inflated and deployed to lift the thigh of the seated occupant P upward. Therefore, when the cushion airbag device 18 is actuated at the time of a frontal collision of the vehicle, the seat occupant P is restrained (regulated) by moving its thigh up and moving forward due to inertia. ing.

As shown in FIGS. 1 and 2, the cushion airbag 22 is inflated and deployed in a substantially U shape opening rearward in a plan view. Specifically, the cushion airbag 22 in the inflated and deployed state communicates the right chamber 22R and the left chamber 22L as the first and second inflating portions and the front ends of the right chamber 22R and the left chamber 22L. 3 It has the front chamber 22F as an expansion part, and is comprised. The right chamber 22R is disposed on the right side of the seat cushion 14 in the seat width direction (vehicle width direction) center line CL, and is developed from the front end portion to the rear portion of the seat cushion 14. The left chamber 22L is disposed on the left side with respect to the center line CL, and is developed from the front end portion to the rear portion of the seat cushion 14. The front chamber 22F communicates the front ends of the right chamber 22R and the left chamber 22L across the center line CL.

The right chamber 22R and the left chamber 22L are configured to face each other in the sheet width direction with the central space portion 22C positioned on the center line CL in an inflated and deployed state. That is, the right chamber 22R, the left chamber 22L, and the front chamber 22F are disposed so as to form (enclose) the central space portion 22C. As described above, the cushion airbag 22 corresponds to the U-shaped airbag of the present invention. The cushion airbag 22 is disposed on the seat pan 14A without being folded or appropriately folded. In this embodiment, the cushion airbag 22 has a substantially U shape that opens rearward in plan view before being inflated and deployed.

As shown in FIG. 5, the right chamber 22R of the cushion airbag 22 is disposed below the right thigh of the seated occupant P, and the left chamber 22L is disposed below the left thigh of the seated occupant P. . In this embodiment, the left and

right chambers

22L, 22R are positioned below the left and right thighs of the large seated occupant Pl and below the left and right thighs of the small seated occupant Ps. Is arranged (interval in the vehicle width direction). It is known that the position of the thigh of the small seated occupant Ps is positioned so as to overlap the inner side portion of the thigh of the large seated occupant Pl. Therefore, the left and

right chambers

22L and 22R are dimensioned to project outward in the seat width direction with respect to the left and right thighs of the small seated occupant Ps.

More specifically, in the cushion airbag 22, the portion shown by hatching in FIG. 6A is a contact portion in a plan view with the small seated occupant Ps. Further, in the cushion airbag 22, the hatched portion shown in FIG. 6B is a contact portion in a plan view with the large seated occupant Pl. The cushion airbag 22 has a configuration in which a contact area with the large seated occupant Pl is larger than a contact area with the small seated occupant Ps and can generate a relatively large reaction force against the large seated occupant Pl. It has become. In other words, the cushion airbag 22 has a contact area with the small seated occupant Ps that is smaller than the contact area with the large seated occupant Pl, and has a relatively small reaction force against the small seated occupant Ps. It has a configuration that can occur.

The cushion airbag 22 is fixed to the seat pan 14A via an inflator 20 disposed therein in the front chamber 22F. The inflator 20 has a cylindrical shape (substantially cylindrical in the present embodiment) that is long in the seat axis direction, and is fixed to the seat pan 14A at a plurality of positions in the longitudinal direction. On the other hand, a gas ejection hole 20 A is formed at the longitudinal end of the inflator 20.

Therefore, the inflator 20 is configured to eject gas from the gas ejection hole 20A when operated. In this embodiment, a plurality of gas ejection holes 20 A are formed along the circumferential direction of the inflator 20. These gas ejection holes 20 A are arranged on the outer side in the vehicle width direction with respect to the center line CL in the vehicle width direction of the cushion airbag 22. Note that gas ejection holes 20 A may be formed on both end sides in the longitudinal direction of the inflator 20.

The cushion airbag device 18 is electrically connected to an airbag ECU as a control device (not shown). The airbag ECU is configured to operate the inflator 20 when a frontal collision (unavoidable) of the vehicle is detected based on a signal from a front collision sensor (not shown).

Further, as shown in FIGS. 3 and 4, the vehicle seat 10 is provided with a seat belt device 26 for restraining the seated occupant P by the webbing 26A at the time of a frontal collision. In this embodiment, a three-point seat belt device 26 is provided in the vehicle seat 10. In addition, the instrument panel 28 (or the steering wheel) in front of the vehicle seat 10 is provided with a front-impact airbag device 30 for restraining mainly the upper body from moving forward in the event of a frontal collision. It has been. FIG. 4 shows a state in which the front passenger airbag 30A for the passenger seat deployed from the instrument panel 28 is deployed.

Next, the operation of this embodiment will be described.

In the vehicle seat 10 configured as described above, when a frontal collision of the vehicle is detected, the inflator 20 of the cushion airbag device 18 is activated. Then, the cushion airbag 22 that receives the gas supply from the inflator 20 is inflated and deployed in the seat cushion 14 and lifts the thigh of the seated occupant P. As a result, the forward movement of the seated occupant P mainly due to the inertia of the lower limbs is suppressed, and the seat occupant P is protected against a collision with an instrument panel or the like. Specifically, the seat occupant P wearing the three-point seat belt device 26 is prevented from entering the seat cushion 14 (so-called submarine phenomenon) by the cushion airbag 22, so that the front of the seat occupant P Movement is well constrained by the three-point seat belt device. In particular, in the case of an automobile that employs a thin instrument panel 28 that is flat in the vertical direction, it is difficult for the knee airbag to support the reaction force from the occupant's knee with the instrument panel 28, and the cushion airbag device 18. Is effective.

Here, since the cushion airbag 22 has a substantially U shape surrounding the central space portion 22C in plan view, the cushion airbag of the comparative example is circular or rectangular in plan view where the central space portion 22C is not formed. Small capacity compared to airbags. For this reason, the cushion airbag 22 is completely inflated and deployed in a short time using the same inflator 20 as compared with the comparative example. Therefore, in the cushion airbag device 18 provided with the cushion airbag 22, that is, the vehicle seat 10, the forward movement of the seated occupant P can be effectively suppressed in a short time after the frontal collision detection. That is, in the comparison with the comparative example, the initial restraint performance at the time of frontal collision is improved.

Further, the cushion airbag 22 is fixed to the seat pan 14A via the inflator 20 disposed in the front chamber 22F. For this reason, when restraining the movement of the seated occupant P forward, the cushion airbag 22 is restricted from moving forward. More specifically, the displacement of the cushion airbag 22 with respect to the seat cushion 14 is effectively suppressed as the seated occupant P moves forward so that the cushion airbag 22 falls forward. Thereby, the initial restraint performance at the time of the frontal collision by the cushion airbag 22 further improves.

The right chamber 22R and the left chamber 22L of the cushion airbag 22 are inflated and deployed below the thighs of the large seated occupant Pl and the small seated occupant Ps. Restraint performance can be obtained. That is, since the position of the thigh of the seated occupant P in the seated state on the seat cushion 14 is substantially common (including portions) from adults to children, the cushion airbag 22 having a substantially U shape in plan view is used. Good initial restraint performance from adults to children. In other words, the capacity of the cushion airbag 22 can be reduced as compared with the comparative example as described above while ensuring the initial restraint performance according to the physique.

Moreover, since the cushion airbag 22 is formed in a substantially U shape that opens rearward, the cushion airbag 22 has no or small portion that contacts the buttocks of the seated occupant P. For this reason, the cushion airbag 22 has a larger difference (ratio) in the contact area with the seated occupant P due to the difference in the physique of the seated occupant P as compared with a circular or rectangular cushion airbag in plan view. Thereby, for example, with respect to the small seated occupant Ps, the forward movement of the seated occupant P can be suppressed with a small contact area while suppressing the reaction force accompanying the inflation and deployment of the cushion airbag 22. That is, the small seated occupant Ps can be appropriately protected (restrained) with a small reaction force because the inertial force acting at the time of a frontal collision is relatively small. On the other hand, for the large seated occupant Pl, a sufficient reaction force that can resist a large inertial force is generated with a large contact area, thereby effectively suppressing the forward movement of the large seated occupant Pl. be able to.

Moreover, since the cushion airbag 22 has the front chamber 22F, gas can be supplied to the left and

right chambers

22L and 22R with a simple configuration. That is, the inflator 20 common to the left and

right chambers

22L and 22R is provided in the front chamber 22F connecting the left and

right chambers

22L and 22R, and gas is supplied to the left and

right chambers

22L and 22R in a short time. It can be set as the structure obtained.

[Other Embodiments]
Next, another embodiment of the present invention will be described. In addition, about the structure fundamentally similar to the structure of the said 1st form or the above-mentioned structure, the code | symbol same as the structure of the said 1st form or the above-mentioned structure is attached | subjected, and the description and illustration are carried out. May be omitted.

[Second Embodiment]
FIG. 7 is a plan view in which a vehicle seat 40 according to the second embodiment is partially cut away. As shown in this figure, the vehicle seat 40 includes a cushion airbag 42 having an annular shape (doughnut shape) instead of the cushion airbag 22 having a substantially U shape in plan view. It differs from the vehicle seat 10 according to the embodiment.

Specifically, the cushion airbag 42 in an inflated and deployed state is communicated with the front chamber 42F and the rear chamber 42T at the front and rear ends of the right chamber 42R and the left chamber 42L that face each other across the central space 42C in the seat width direction. ing. In other words, the right chamber 42R, the left chamber 42L, the front chamber 42F, and the rear chamber 42T are arranged so as to form (enclose) the central space portion 42C located on the center line CL. In this embodiment, the cushion airbag 42 is inflated and deployed in an annular shape in plan view as a whole. As described above, the cushion airbag 42 corresponds to the annular airbag of the present invention. The cushion airbag 42 is arranged on the seat pan 14A without being folded or appropriately folded. In this embodiment, the cushion airbag 22 has an annular shape in plan view before being inflated and deployed.

Further, as shown in FIG. 8, the seat cushion 14 constituting the vehicle seat 40 is provided with a seat cooling device 44 as a seat cooling means. The seat cooling device 44 is configured to include a seat fan unit 46 that sucks air in the passenger compartment from the lower suction port 46A and blows it out from the blowout port 46B. The seat cooling device 44 includes a duct 48 that guides the air blown out by the seat fan unit 46 to the lower surface side of the cushion material 14B. The seat fan unit 46 is fixed to the seat pan 14A of the seat cushion 14 via a bracket (not shown).

As shown in FIG. 7, the duct 48 passes through the seat pan 14A from below, and an opening 48A at the downstream end thereof opens in the central space 42C in plan view. Thus, the air blown from the opening 48A of the duct 48 is configured not to be blocked by the cushion airbag 42. The air blown out from the opening 48A is blown out onto the seat cushion 14 through the cushioning material 14B (and the skin material) having air permeability. Other configurations of the vehicle seat 40 are the same as the corresponding configurations of the vehicle seat 10 including a portion not shown.

Therefore, the vehicle seat 40 according to the second embodiment is basically slightly inferior to the vehicle seat 10 in that it provides an appropriate protection form corresponding to the physique difference of the seated occupant P, but basically the first embodiment. The same effect can be obtained by the same action as the vehicle seat 10 according to the above. Further, in the vehicle seat 40, since the opening 48A of the duct 48 opens in the central space portion 42C of the cushion airbag 42, both the cushion airbag device 18 and the seat cooling device 44 are provided in the seat cushion 14. be able to. That is, both safety and comfort of the seated occupant P can be achieved.

[Third Embodiment]
FIG. 9 is a plan view in which a vehicle seat 50 according to the third embodiment is partially cut away. As shown in this figure, the vehicle seat 50 includes a cushion airbag 52 having a substantially rectangular ring shape (elliptical ring shape) in place of the cushion airbag 42 having a generally annular shape in plan view. It differs from the vehicle seat 40 according to the embodiment.

Specifically, the cushion airbag 52 in an inflated and deployed state is communicated with the front chamber 52F and the rear chamber 52T at the front and rear ends of the right chamber 52R and the left chamber 52L that face each other across the central space 52C in the seat width direction. ing. In other words, the right chamber 52R, the left chamber 52L, the front chamber 52F, and the rear chamber 52T are arranged so as to form (enclose) the central space portion 52C located on the center line CL. In this embodiment, the right chamber 52R and the left chamber 52L are each formed in a linear shape that is long in the front-rear direction.

The cushion airbag 52 is inflated and deployed in a substantially rectangular ring shape in plan view as a whole. As described above, the cushion airbag 52 corresponds to the annular airbag of the present invention. The cushion airbag 52 is arranged on the seat pan 14A without being folded or appropriately folded. In this embodiment, the cushion airbag 22 has an annular shape in plan view before being inflated and deployed. Other configurations of the vehicle seat 50 are the same as the corresponding configurations of the vehicle seat 40 including a portion not shown.

Therefore, the vehicle seat 50 according to the third embodiment can basically obtain the same effect by the same operation as the vehicle seat 40 (vehicle seat 10) according to the second embodiment. Further, in the vehicle seat 50, the cushion airbag 52 has a substantially rectangular ring shape, and therefore, the vehicle seat 50 is preferably applied to a vehicle seat provided with a relatively large seat cushion 14.

[Fourth Embodiment]
FIG. 10 is a plan view in which a vehicle seat 60 according to the fourth embodiment is partially cut away. As shown in this figure, the vehicle seat 60 is provided with a mesh cloth 62 as a joining cloth covering the central space portion 42C of the cushion airbag 42 having a substantially annular shape in plan view. It differs from the vehicle seat 40 according to the embodiment.

Specifically, the mesh cloth 62 is made of a mesh fabric and has air permeability. For this reason, the air from the seat cooling device 44 is guided to the cushion material 14B through the mesh cloth 62. The mesh cloth 62 is joined to each of the right chamber 42R, the left chamber 42L, the front chamber 42F, and the rear chamber 42T constituting the cushion airbag 42 by sewing or the like. In this embodiment, the mesh cloth 62 formed in a substantially circular shape in plan view is joined to the inner edge of the cushion airbag 42 by sewing over the entire circumference.

More specifically, the cushion airbag 42 is formed by joining a pair of upper and lower base fabrics 42Up, 42Lw, as shown in half in FIG. The mesh cloth 62 is joined to the inner peripheral flange portion 42Fi, which is a joint portion between the upper and lower base fabrics 42Up and 42Lw, by sewing over the entire circumference. Other configurations of the vehicle seat 60 are the same as the corresponding configurations of the vehicle seat 40, including portions not shown.

Therefore, even with the vehicle seat 60 according to the fourth embodiment, basically the same effect can be obtained by the same action as the vehicle seat 40 (vehicle seat 10) according to the second embodiment. In the vehicle seat 60, the mesh cloth 62 may cause the right chamber 42R, the left chamber 42L, the front chamber 42F, and the rear chamber 42T to be separated from each other when the passenger is protected (restrained) against the front collision by the cushion airbag 42. (Tension). That is, the cushion airbag 42 is reinforced by the mesh cloth 62. Thereby, the cushion airbag 42 falls forward due to the forward movement of the seated occupant P, and an increase in the amount of forward movement of the seated occupant P due to this is effectively suppressed. In particular, in combination with the structure in which the front chamber 42F is fixed to the seat pan 14A via the inflator 20, an increase in the amount of forward movement of the seated occupant P is more effectively suppressed.

In addition, although the example in which the vehicle seat 60 according to the fourth embodiment includes the mesh cloth 62 is shown, the mesh cloth 62 may be provided in the

cushion airbags

22 and 52 according to the first and third embodiments. good. In addition, although the example in which the vehicle seats 40, 50, 60 according to the second to fourth embodiments are provided with the seat cooling device 44 has been shown, for example, in the first embodiment, the duct 48 is connected to the central space portion 22C. The sheet cooling device 44 may be provided so that the opening 48A faces. On the other hand, in the configuration in which the sheet cooling device 44 is not provided and the bonding cloth is provided, the bonding cloth may not have air permeability.

Further, in each of the above-described embodiments, an example in which the vehicle seats 10, 40, 50, 60 are passenger seats is shown, but the present invention is not limited to this. The vehicle seats 10, 40, and 50 may be driver seats, or may be seats in the second and subsequent rows in a vehicle having a plurality of rows of seats.

Further, in each of the above-described embodiments, the example in which the

right chambers

22R, 42R, 52R and the

left chambers

22L, 42L, 52L are communicated with each other in the

front chambers

22F, 42F, 52F, etc. has been shown. It is not limited. For example, the gas may be independently supplied to the chamber that is the left and right independent bags, and the gas is supplied from the inflator (diffuser) that is common to the chambers (first and second inflating portions) that are the left and right independent bags. It is good also as a structure to supply. For example, it is good also as a structure provided with the communication chamber (3rd expansion part) which connects left and right chambers (1st, 2nd expansion part) by parts (only the rear end side etc.) other than a front end.

Furthermore, in each of the above-described embodiments, the seated occupant P of the vehicle seats 10, 40, 50 is applied to the

cushion airbag devices

18, 42, 52, the three-point seat belt device 26, and the front impact airbag device 30. However, the present invention is not limited to this. For example, the present invention may be applied to a vehicle seat provided with an occupant protection device instead of the three-point seat belt device 26. Such an occupant protection device includes, for example, a lap belt that is attached to the occupant's waist at the time of a front collision, an occupant's upper body, and an instrument on a lap bar that is not in contact with the abdomen of the seated occupant P and is disposed in the vehicle width direction forward Built-in airbag that deploys between panels.

In addition, the present invention can be implemented with various modifications without departing from the scope of the invention.

Claims

Seat cushions,
A first inflatable portion that is provided on one side of the seat cushion in the seat width direction and is inflated and deployed by receiving gas supply;
A second inflation provided on the other side of the seat cushion in the seat width direction and inflated and deployed so as to be opposed to the first inflatable portion in the seat width direction with a central space portion sandwiched between the first inflation portion. And
A gas supply means for supplying gas to the first and second inflating parts by being actuated during a frontal collision of the vehicle;
Vehicle seat equipped with.
The vehicle seat according to claim 1, further comprising a third inflating portion that communicates the first inflating portion with the second inflating portion.
3. The vehicle seat according to claim 2, wherein the first to third inflatable portions constitute a U-shaped airbag that opens rearward in the front-rear direction of the seat in plan view and surrounds the central space portion.
3. The vehicle seat according to claim 2, wherein the first to third inflating portions constitute a part of an annular airbag that surrounds the central space portion in plan view.
The vehicle seat according to any one of claims 2 to 4, wherein the gas supply means is disposed in the third inflating portion and fixes the third inflating portion to the seat cushion.
6. The apparatus according to claim 2, further comprising a bonding cloth provided in the seat cushion so as to cover the central space portion and bonded to each of the first to third inflating portions. Vehicle seat.
It is arranged to face the central space portion and constitutes at least a part of the seat cooling means, further comprising a duct for blowing out air in the seat cushion,
The vehicle seat according to claim 6, wherein the bonding fabric has air permeability.
The vehicle according to any one of claims 1 to 5, further comprising a duct that is disposed facing the central space portion and constitutes at least a part of a seat cooling means, and blows air out of the seat cushion. Sheet.